Arrived on site for heating maintenance. Changed filters of outside unit. Cleared condensation line. Inspected belt condition, belt is tight and secured. Condition: Good. Went inside and turned all thermostat to heating. Went to both furnace inside the building. Changed both AprilAir filter. Cleaned flame sensor on both units. Inspected unit's wiring, Condition:Tight and secured. Both units ran normally and safely. No gas leaks detected. Flame/combustion runs good. No uncontrolled fire movements. Put both units back together and unit came back on normally. Return the temperature back to how it was on the thermostat.
